Liquid additive apparatus of an aspirating and mixing type



sept. 17, 1968 R. v. WHm; I 3,401,712

LIQUID ADDITIVE APPARATUS OF AN ASPIRATING AND MIXING TYPE Filed Sept.ll, 1964 2 Sheets-Shea?l l www sept. 17, 196s LIQUID ADDITIVE APPARATUSOF AN ASPIRATING AND MIXING TYPE Filed Sept.

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vn'a-- FISQ R. v. WHITE 3,401,712

2 sheets-Sheet 2 INVENTOR.

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United States Patent O 3,401,712 LIQUID ADDITIVE APPARATUS F ANASPIRATING AND MIXING TYPE Rex V. White, 2048 S. La Cienega Blvd., Apt.1,

Los Angeles, Calif. 90034 Continuation-impart of application Ser. No.311,085,

Sept. 24, 1963. This application Sept. 11, 1964, Ser. No. 395,863

13 Claims. (Cl. 137-101.27)

ABSTRACT 0F THE DISCLOSURE A liquid additive device including aspirationapparatus for mixing two liquids in a controllably adjustable ratio in aVenturi means composed of two concentric flow paths where the interiorflow path is defined by a longitudinally movable tube. By moving themovable tube, the length of the concentric portion of the ow path, andhence the resistance to the aspiration, may be regulated.

This application is `a continuation-in-part of my originally co-pendingpatent application for Liquid Additive Apparatus, Ser. No. 311,085,filed Sept. 24, 1963, and subsequently issued as U.S. Patent No.3,211,166.

Generally speaking, the present invention relates to liquid additiveapparatus of an aspirating and mixing type adapted for use in adding afirst liquid to a second liquid in a desired ratio and, moreparticularly, one preferred exemplary form of the invention pertains tochlorinating apparatus for adding a concentrated chlorine-containingliquid to a larger quantity of circulating swimming pool water in adesired ratio (which is preferably controllably adjustable) and alsoadapted to effectively mix said concentrated chlorine-containing liquidand said swimming pool water together whereby to effectively provide adesired concentration of chlorine in the swimming pool water forantiseptic purposes as is customary in swimming pool water.Incidentally, it should beY noted that the` chlorine containing liquidmay be either directly added to the swimming pool water by recirculationof at least a portion of said swimming pool water from a swimming poolthrough the apparatus of the present invention and back to the swimmingpool, or may be provided by adding and mixing the chlorine-containingliquid to an auxiliary supply of make-up water which is fed into theswimming pool for the purpose of maintaining the height of the topsurface .of the water in the swimming pool substantially at apredetermined level. Indeed, broadly speaking, the apparatus of thepresent invention may be used for adding one fluid to another owingfluid in any desired ratio irrespective of whether in a closed-loopcircuit or system or otherwise, although the invention is particularlysuitable for such chlorinating of swimming pool water by either of theprocedures mentioned above.

It should be clearly noted that the apparatus is not specificallylimited to the above-mentioned specific preferred form of the invention,although it does comprise a highly effective form of the invention whichprovides a compact and self-contained type of chlorinator unit which canbe readily connected in circuit (either directly in circuit or by way ofmake-up water added thereto, as mentioned above) with a much largerquantity of swimming pool water and which will be operable over a longperiod of time without maintenance or personal inspection being requiredand which will effectively maintain a required concentration of chlorine(or a pH controlling acidifying chemical or liquid, or any other desiredadditive material) in the swimming pool water in a manner which isgreatly superior to, more effective and more uniform than, and muchsimpler as to size, complexity and cost of the appa- 3,401,712 PatentedSept. 17, 1968 "ice ratus required for doing same than, conventionalprior art systems for chlorinating swimming pool water.

Therefore, the present invention will be described throughout thisapplication primarily with reference to such a specic form thereofwherein it comprises chlorinating apparatus for swimming pool water.However, it is to be clearly understood that this is exemplary only andis to be construed in a non-limiting sense.

In connection with the above, it should be noted that various prior artchlorinating apparatuses and procedures have been invented and developedheretofore and are employed as conventional prior art equipment andpractices. For example, various large mixing chambers whereinchlorine-containing liquid and water can be mixed (either power mixed orhand mixed) and then fed into the swimming pool water have been inventedand developed heretofore and have been frequently employed inconventional prior art practice for this purpose. Also, in certaincases, chlorine-containing concentrate has been otherwise added to theswimming pool water by various different techniques and/or apparatuses.However, most of these prior art apparatuses and techniques haveinvolved what might be called batch type processes wherein relativelylarge quantities of chlorine-containing concentrate `are added to theswimming pool water at a particular time and then substantial periods oftime elapse before the next such operation occurs. This results incausing too high a concentration of chlorine in the swimming pool waterinitially immediately after such an operation and too low aconcentration of chlorine in the swimming pool water just before thenext such chlorinating operation. In other words, such prior arttechniques and apparatuses have all of the defects inherent in all suchbatch type operations as opposed to so-called continuous flow typeoperations.

Furthermore, most prior art apparatuses for the abovementionedchlorinating purposes have been relatively large, costly, complex, anddifficult to handle.

It should be clearly noted that the apparatus of the present inventionis of what might be termed a continuous flo'w type since it is adaptedto continually add the chlorine-containing concentrate in a desired andusually controllably adjustable ratio (which will be very precisely andaccurately adjusted) with respect to the swimming pool water wheneversaid water is either being recirculated by a conventional pump orwhenever additional pressurized make-up water is being fed into the mainbody of swimming pool water. This produces ideal sanitation conditionsin the swimming pool water and actually minimizes the expense involvedin chlorinating such swimming pool water.

Additionally, it should be noted that the apparatus of the presentinvention may be arranged to feed a desired metered quantity of pHmodifying liquid (usually an acid solution) into the swimming pool water(either directly or by way of additional pressurized make-up water) soas to maintain the pH of the swimming pool water at an ideal value forsanitation purposes and for the minimization of the growth of algae andother undesirable organisms or plant life.

Furthermore, it should be noted that the apparatus of the presentinvention is of a very small, simple, easy-toinstall, easy-to-operate,relatively inexpensive, virtually foolproof, construction which isself-operating over substantial periods of time and which will requirelittle or no maintenance or inspection by the owner of a swimming pool,or swimming pool maintenance personnel, in the undesirable manner ofcertain types of prior art chlorinating apparatus and equipments.

With the above points in mind, it is an object of the present inventionto provide novel fluid (usually liquid) additive apparatus of anaspirating and mixing type for adding a first fluid (usually liquid) toa second (usually liquid) in a desired ratio.

It is a `further object of the present invention to provide additiveapparatus of the character referred to in the preceding object, whereinsaid desired ratio is controllably adjustable in a very precise andaccurate manner and wherein the apparatus also acts to effectively mixthe two liquids together.

It is a further object of the present invention to provide liquidadditive apparatus of the character referred to hereinbefore, which inone specific preferred form, comprises chlorinating apparatus for addinga chlorine-containing concentrate to a larger quantity of swimming poolwater (either directly by addition to a recirculated quantity of saidswimming pool water or by way of addition to new make-up water fed intoand added to the main body of swimming pool water) in a desired ratio(which is usually controllably adjustable in a very precise and accuratemanner) and for effectively mixing same together in what might be termeda continuous tiow type of process which produces optimum sanitizing ofthe swimming pool water at minimum expense with respect to thechlorine-containing concentrate and also with respect to the apparatusinvolved.

It is a further object of the present invention to provide novel.chlorinating apparatus of the character referred to hereinbefore, whichin one preferred form thereof is arranged to become automaticallyoperative in response to the operation of a conventional circulatingmain pump for the main body of swimming pool water and which is arrangedto become inoperative in response to the deactivation or inactivation ofsaid main swimming pool pump. In other words, in this preferred form ofthe invention, the chlorinating apparatus does not require any separateoperating and/or control means and does not operate independently of themain swimming pool pump. This minimizes the cost and complexity of thisform of the apparatus and, furthermore, makes it virtuallymaintenance-free since the main swimming pool pump is usuallyclock-controlled or timer-controlled or, in certain cases, might beliquid level-controlled or otherwise automatically controlled foroperation either at various time cycles or as needed in accordance withthe fall and rise of the level of the vtop surface of the swimming poolwater in the swimming pool, and they will also control the operation ofthe novel chlorinating apparatus of the present invention, which isadditionally provided with valving in one form thereof so arranged as toprevent the complete emptying of the chlorinating apparatus which mightotherwise require that the main swimming pool water pump be primedbefore it can again be satisfactorily operated (except in I thosearrangements where the self-priming type).

It is a further object of the present invention to provide novelchlorinating apparatus of the character referred to hereinbefore whichis arranged so as to be capable of adding the chlorine-containingconcentrate to the circulating swimming pool water either on the inow,suction or low pressure side or on the outow or high pressure side of aconventional circulating main pump for the swimming pool water, or whichis capable of adding any other desired additive liquid with respect towater or the like in substantially the same manner that is, at eitherhigh pressure or low pressure portions of a hydraulic circuit connectedto said large quantity of water or the like.

It is a further object of the present invention to provide apparatus ofthe character referred to hereinbefore wherein the combination of thetwo liquids to be mixed is provided by a novel type of aspiration meansand a novel type of ratio-controlling means for effectively controllingin a very precise and accurate manner the ratio of the two liquidscombined and mixed by the novel apparatus of the present invention.

It is a further object of the present invention to provide apparatus ofthe character set forth in the preceding pump itself might be of aobject wherein the aspiration means effectively comprises a Venturimeans of a controllably adjustable length and, therefore, also of acorrespondingly controllably adjustable back friction with respect tothe ow of one of said liquids to be mixed as it passes therethrough. Inthis form of the invention, the above-mentioned ratio-controlling meansmay include means for controllably adjusting the effective length of therestricted area Venturi of the aspiration means whereby tocorrespondingly adjust the effective back friction provided by saidlength thereof so as to very precisely and accurately control the amountof one of said liquids -fed therethrough into the other of said liquidsas it ows through said aspiration means.

It is a further object of the present invention to provide apparatus ofthe character referred to hereinbefore, embodying any or all of thefeatures referred to hereinbefore, either generically or specifically,individually 0r in combination, and which is of relatively simple,inexpensive, easy-to-install, easy-to-operate construction capable ofmass manufacture at relatively low cost and which requires a minimum ofmaintenance and supervision whereby to be conducive to widespread usethereof.

Further objects are implicit in the detailed description which followshereinafter (which is to be considered as exemplary of, but notspecifically limiting, the present invention), and said objects will beapparent to persons skilled in the art after a careful study of thedetailed description which follows hereinafter.

For the purpose of clarifying the nature of the present invention, oneexemplary embodiment of the invention is illustrated in thehereinbelow-described figures of the accompanying Itwo drawing sheetsand is described in detail hereinafter, together with certain veryslight variations thereof shown in part in broken lines.

FIG. l is a reduced-size front perspective view of one exemplaryembodiment of the apparatus of the present invention wherein it is shownas comprising a chlorinating apparatus for adding a chlorine-containingconcentrate liquid to a pressurized flowing second liquid which may beeither a recirculated quantity of main swimming pool water or additionalor new make-up water adapted to be fed into the main quantity of suchswimming pool water, or the like.

FIG. 2 is a fragmentary view, partly in section and partly in elevation,taken substantially along the plane indicated by the arrows 2 2 of FIG.1.

FIG. 3 is a slightly smaller scale top view taken along the planeindicated by the arrows 3 3 of FIG. 2 and shows certain portions of theapparatus in cross section and certain portions of the apparatus in fullor partial top plan elevation.

FIG. 4 is an enlarged fragmentary sectional View, taken in the directionof the arrows 4 4 of FIG. l and illustrates a typical one of the twosimilar outflow-controlling float valve means and associated parts, andit should be understood that while this one is the one controllingouttlow from the rst chamber means, the other one controlling outow fromthe second chamber means is substantially identical and, therefore, isnot similarly shown in section.

FIG. 5 is an enlarged fragmentary view taken along the plane indicatedby the arrows 5 5 of FIG. 3 and shows the interior construction of atypical one of the two different aspiration means of the exemplary formof the invention. It should be clearly understood that the otheraspiration means is of similar interior construction and, therefore, isnot shown in a similar cross section.

FIG. 6 is a fragmentary partly broken away view, partly in section andpartly in elevation as indicated by the arrows 6 5 of FIG. 3, andillustrates one exemplary form of the controllably adjustableratio-controlling means `for controllably adjusting the length of therestricted-area Venturi portion, best shown in FIG. 5, whereby toprovide a very precise and accurately controlled mixture of first andsecond liquids, such as a chlorine-containing concentrate andpressurized flowing water, for example.

FIG. 7 is an enlarged fragmentary sectional view taken in the directionof the arrows 7-7 of FIG. 3 and illustrates a typical one of theplurality of controllably adjustable valve means comprising anotherportion of the above-mentioned ratio-controlling means.

FIG. 8 is a schematic view illustrating the hydraulic circuitry of oneexemplary system embodying the chlorinating apparatus of the presentinvention connected in circuit with a large quantity of swimming poolwater and a small quantity of additional make-up water for effectivelychlorinating same in -a desired optimum manner. This view illustratescertain slight variations or optional modifications of the primarycircuitry in broken lines in FiG. 8.

FIG. 9 is a fragmentary block diagrammatic View illustrating a timer orclock type controller such as may be used for controlling the inputvalve to the chlorinator of FIG. 8 and/or such as may be used forcontrolling energization of the motor driving the main swimming poolwater circulating pump as shown in FIG. 8.

FlG. l0 is a fragmentary block diagrammatic View illustrating a mainswimming pool water level sensor and controller such as may be used forcontrolling the input valve to the chlorinator of FIG. 8 (of course, inlieu of the timer ir clock type controller shown in FIG. 9) and/or suchas may be used for controlling energization of the motor driving themain swimming pool water circulating pump as shown in FIG. 8 (also, inlieu of the timer or clock type controller shown in FIG. 9).

Generally speaking, the liquid additive apparatus of the presentinvention comprises first inflow means adapted to be supplied with anadditive first liquid which is to be added to a pressurized flowingsecond liquid and further comprises second inflow means adapted to besupplied with said pressurized flowing second liquid, with both saidfirst and second inflow means being provided with common outflow meansconnected thereto, and having aspiration means eectively connected incircuit with said first and second inflow means and said common outflowmeans for passing said pressurized flowing second liquid through saidaspiration means to said common outflow means, and including aneffective Venturi means in communication with said first inflow meansfor applying aspirating suction thereto for aspirating a desiredquantity of said additive first liquid into said pressurized flowingsecond liquid and for subsequently mixing same prior to feeding sameoutwardly through said common outflow duct means to a desired receiver,such as the main body of swimming pool water in a swimming pool in onepreferred specific form of the invention.

In the preferred form of the invention, the aspiration means iseffectively provided with adjustable ratio-controlling means forcontrolling the ratio of said first liquid, such as achlorine-containing concentrate liquid or the like, aspirated from saidfirst inflow means through said Venturi means into the pressurizedflowing second liquid, such as either make-up water for the main body ofswimming pool water or a recirculated portion of said main body ofswimming pool water in one preferred form of the invention.

In the exemplary form of the invention illustrated, the first inflowmeans broadly referred to above, is generally designated by thereference numeral 21 and is shown in one specific exemplary form whereinit comprises a first chamber means generally designated at 21A and onefirst inflow conduit portion designated by the reference numeral 21Bwhich connects to one aspiration means, generally designated by thereference numeral 22. It should be noted that said first inflow means 21also includes another first inflow conduit portion 21B connected to asecond aspiration means 22', which is substantially identical inconstruction to the first-mentioned aspiration means 22.

In the exemplary form of the invention illustrated, the common outflowmeans broadly referred to above is generally designated by the referencenumeral 23 and includes a second chamber means generally designated at23A into which the first-mentioned aspiration means 22 discharges themixed first and second liquids and also includes an outflow conduitportion 23B.

The aspiration means 22 is provided downstream thereof with a commonoutflow means designated generally by the reference numeral 23', whichmerely comprises an outflow conduit 0r duct portion usually referred toherein as a common output conduit portion, 23B', a check valve 24 and acontrol valve 25.

The first inflow means, generally designated at 21, is adapted to besupplied with an additive first liquid, such as is designated by thereference numeral 26 in FIG. 2, and which may be a chlorine-containingconcentrate liquid when the apparatus takes the -form of a chlorinator,or which may be various other liquids in other forms of the invention.Incidentally, said liquid 2-6 may be fed into the first chamber 21A inany of a variety of ways. Said -chamber 21A may be merely filled up to adesired upper level corresponding to a volume such as to allow theapparatus to operate for a relatively long period of time beforerefilling is required. On the other hand, an automatic feeder, such asis designated fragmentarily in broken lines at 27 in FIG. 2, may beemployed for feeding such a chlorine-containing liquid through acontrollably adjustable-valve 28 into the chamber 21A, if desired, orvarious other means for supplying the first additive liquid 26 may beemployed in lieu of those referred to above.

The second inflow means broadly referred to above is generallydesignated by the reference numeral 29 and comprises an input conduit,tube, or pipe 31, adapted to be supplied with a pressurized flowingsecond liquid, such as a quantity of make-up water, or the like.However, even when the apparatus is a chlorinator generally of theexemplary type illustrated, said second liquid may not comprise newmake-up water but may comprise a recirculated portion of the -main bodyof swimming pool water when the input to the chlorinator, general-lydesignated at 33 in FIG. 8, follows the alternate optional broken linepath, indicated at 34 in FIG. 8, rather than the solid line pathindicated at 35 in FIG 8, which comprises an input connection from awater supply main or the like connected to the input pipe 31.

Said second inflow means generally designated at 29 also includes asecond inflow conduit portion 29A which is connected to thefirst-mentioned aspiration means 22 and which is adapted to supply saidpressurized flowing second liquid, which comes from the input pipe 31,to the interior of the first-mentioned aspiration means 22 whereby tosuck a desired ratio of the first-mentioned liquid 26, comprising achlorine-containing concentrate l in the examplary form of the inventionillustrated, into said flowing pressurized second liquid within thefirstmentioned aspiration means 22 and to then effectively mix anddischarge same through an outlet discharge opening 36 of saidfirst-mentioned aspiration means 22 into said previously mentionedsecond chamber means 23A (comprising a part of the common outflow meansgenerally designated at 23) which will contain the desired mixed firstand second liquids, which are designated by the reference numeral 37,for subsequent discharge through the common output conduit portion 23Bof said common outflow means generally designated at 23. It should beunderstood that said common output conduit portion 23B of said commonoutflow means 23 is adapted to be effectively connected to the inputside of a main swimming pool water recirculating pump, such as isdesignated by the reference numeral 38 in FIG. 8, for subsequent pumpingfrom the low pressure input side 39 thereof through the pump 38 andthrough the outlet or high pressure side 41 thereof, and then throughthe filter 42 and back through the return conduit means 43 into theswimming pool generally designated at 44 for subsequent withdrawalthrough outlets 45 and 46 and for suction back to the 'low pressuresuction or input side 39 of said main swimming pool water circulationpump 38. In other words, make-up water is fed through the control valve47 from a water supply main 35 to the input conduit or pipe 31 of thechlorinator 33 and then follows the outow path of the common outputconduit portion designated at 23B and comprising a part of thepreviously mentioned common outflow means generally designated at 23. Itwill be noted that this flow path contains two different controllablyadjustable valve means generally designated at 48 and 49.

The control valve 58, which may be said to comprise both an on-and-offcontrol valve and a controllably adjustable metering valve, may beemployed for controlling the flow of said pressurized flowing secondliquid comprising the input water fed through the input pipe 31 which ispassed through the inflow conduit portion 29A to the first-mentionedaspiration means 22. The other control valve 49, which may `be said tocom-prise both an on-and-off control valve and a controllably adjustablemetering valve, may be employed for controlling the flow of the mixtureof the rst and second liquids 37 from the second chamber means 23Athrough an outletow controlling float valve means generally designatedat 51 to the common out conduit portion 23B of the common outflow means23. Each of these valves 48 and 49 is of a type similar to thatillustrated in FIG. 7 which is similarly connected in the inlet conduitportion 21B carrying the additive first chlorine-containing concentrateliquid 26 to the first-mentioned aspiration means 22, and said exemplarycontrollably adjustable metering valve means member is described indetail hereinafter, in connection with FIG. 7.

The inflow pipe 31 0f the inflow means 29 is provided with an inflowcontrolling oat valve means, generally designated at 52, and adapted tocontrol the inflow of said pressurized water from the inflow pipe 31 tothe first-mentioned aspiration means 22 in a manner such that wheneverthe mixed first and second liquids 37 in said second chamber means 23Arises to a predetermined upper maximum level, the float member 53 ofsaid oat valve means 52 moves the operating arm 54 thereof upwardly to adegree such as to close off the valve portion 55 thereof whereby ytocompletely close all inflow of said pressurized second liquid throughthe inflow pipe 31 and conduit portion 29A to the first-mentionedaspiration means 22.

The previously mentioned outflow-controlling oat valve means 51 is ofdifferent construction from the inflow controlling float valve means 52is intended to be functionally quite similar but for outoW-controllingpurposes with respect to the mixed liquids 37 in the chamber 23A. Itwill be noted that it comprises a buoyant float member 56 in a guidechannel 57 and having a sealing lower surface S8 adapted to abut a valveopening 59 when in its lowermost position whereby to effectively sealoff and close said valve opening 59 and prevent the flow of the mixedliquid 37 through said valve opening 59 and through the previouslymentioned common output conduit portion 23B of the common outflow means23. The detailed construction of said outflow-controlling float valvemeans 51 and the associated parts will be more readily understood fromcareful consideration of the very similar construction of the outflowcontrolling iioat valve mean-s indicated generally at 51a as beingcarried by the first chamber means 21A, which is shown in considerabledetail in FIG. 4 wherein corresponding parts of said fioat valve means,indicated generally at 51a, are indicated by reference numerals similarto those used for designating the elements of the first-mentioned floatvalve means 51, followed by the latter, a, however. Saidoutflow-controlling valve means 51 of the second chamber means 23A actsin a manner for the effective closure of the common outflow means 23,and the common output conduit or duct portion 23B connected to saidsecond chamber means 23A thereof, in response ot the falling of themixed first and second liquids 37 from said second chamber means 23A toa predetermined lower minimum top surface level thereof, and is alsooperable for the effective opening of said valve means 51 in response tothe rising of the top surface level of said mixed liquids 37 above saidpredetermined lower minimum level thereof. This arrangement acts toprevent the level of the mixed liquids 37 from ever falling below thelevel of the valve opening 59 which might have the effect of causing themain swimming pool pump 38 shown in FIG. 8 to lose its prime. This isalso true with respect to the previously mentioned outflow-controllingfloat valve means 51a of the first chamber means 21A, which acts toprevent the level of the chlorine-containing concentrate liquid 26- fromever falling below the level of the valve opening 59a which might letair get the conduit portion 21B whereby to affect the subsequent feed ofsaid chlorine-containing concentrate liquid therethrough and which mightundesirably affect the prime of said main swimming pool pump '38 :shownin FIG. 8. The inflow controlling float valve 52 merely acts to feedincoming pressurized water through the inflow pipe 31 to thefirst-mentioned aspiration means 22 intermittently so that at all timesthe mixture of the first and second liquids, as designated at 37 in thesecond chamber means 23A, will lie either at a desired height or withina desired height range.

The first-mentioned aspiration means 22 is effectively provided withratio-controlling means for controlling the ratio of the firstchlorine-containing concentrate liquid 26 fed into the mixed with thepressurized flowing water supplied through the inflow pipe 31 and theinfiow conduit portion 29A to the first aspiration means 22. Said ratiocontrolling means is generally designated by the reference numeral 62and will be described in detail hereinafter. Said first-mentionedaspiration means 22 is exemplary of the second-mentioned aspirationmeans 22', and the detailed construction of only the first-mentioned onewill, therefore, be described in detail at this point and should beconsidered as being applicable to the second-mentioned aspiration means22 also. This is also true with respect to the ratio-controlling meansgenerally designated at 62 of said second-mentioned aspiration means221. It should be noted that the various elements of thesecond-mentioned aspiration means 22 and of the associatedratio-controlling means 62 are indicated by numbers corresponding ytothose designating corresponding parts of the first-mentioned aspirationmeans 22 and the first-mentioned ratio-controlling means 62, primed,however.

With respect to said first-mentioned aspiration means 22, it should benoted that it comprises a body member 63 lwhich includes a main flowpassage or bore hole 64 formed therein and adapted to be relativelyslida'bly connected in a sealed manner, as indicated at 65, to the inowconduit portion 29A of the second iniiow means indicated generally at29. Said first-mentioned aspiration means 22 also has said first inflowconduit portion 21B of said -first inflow means, generally designated at21, connected thereto in a sealed manner, as indicated at 66,

f' so as to be in communication with an upstream portion of said mainflow passage 64.

It will be noted that said first-mentioned aspiration means 22 may besaid to include an effective Venturi means, such as is generallydesignated at 67, which is formed by reason of the insertion of theforward nozzle end portion `68 `of sad inlet conduit portion 29A withinthe larger area upstream Venturi portion 69 of the larger diameter mainIflow passage means 64, thus forming an effective Venturi flow passage71, for said additive first liquid 26, of effectively reducedcross-sectional flow path area as compared with corresponding upstreamand downstream effective cross-sectional flow path areas and being ofcontrollably adjustable variable length, in a manner described morefully hereinafter, whereby to correspondingly provide controllablyadjustable variable effective back friction opposing the passage of saidadditive first liquid 26 through the reduced-area annular effectiveVenturi flow passage 71 for effectively controlling the mount of saidadditive 'first liquid 26 which is sucked therethrough by the Venturi oraspirating action of the Venturi means `'67 into the unobstructedforward portion of the ymain flow passage means 64. It will be notedthat by merely inserting the nozzle 68 further into the main flowpassage 64 the length of the restricted area effective Venturi flowpassage 71 is increased and the above-mentioned back friction iscorrespondingly increased, which reduces the amount of additive Ifirstliquid, comprising the chlorine-containing concentrate liquid 26, Iwhichis added to the main stream of pressurized water coming from the inflowpipe 311 and through the nozzle 68. On the other hand, partiallywithdrawing the nozzle 68 will reduce said back friction and increasethe amount of chlorine-containing concentrate liquid 26 mixed in withthe main pressurized flowing water supplied from the input pipe 31.

The ratio-controlling means generally designated at 62 comprises a gear72 provided with a manually rotatable knob 73 and rotatably mounted onthe block member 63 and in engagement with a slidable toothed rack 74which has its rear end firmly connected to a coupling member 75 carriedby the slidably movable inlet conduit portion 29A behind the nozzle part68 thereof. Thus, it will be understood that by merely rotating the knob73 the toothed rack 74 can be caused to move longitudinally whereby tocorrespondingly move the nozzle 68 either inwardly or outwardly forratio-controlling purposes. The setting can be repeated at any time byreason of the scale and index means comprising the index member 76carried by the block 63 and the scale means 77 carried by the rack 74.It should be noted that the rack 74 may be carried by a bifurcated slidemember adapted to engage grooved slide receivers 74A in oppositesurfaces of the block 63 or may be otherwise slidably mounted in afunctionally equivalent manner. Various other means for adjusting theratio-controlling means l62 may also be employed.

It should be noted that the previously mentioned second inflow means,generally designated at 29, also includes an additional inflow conduitportion 29A connected in parallel with respect to and vsubstantiallyfunctionally equivalent to previously described inflow conduit portion29A of said second inflow means 29. Also, said additional inflow conduitportion 29A' is provided with a controllably adjustable metering valvemeans 48 generally similar to the previously described controllablyadjustable metering valve means 48. Also, said inflow conduit portion29A is connected to the previously mentioned second aspirating means 22'in a manner similar to the connection of the inflow conduit portion 29Ato the first-mentioned aspiration means 22 as illustrated in detail inFIG. 5 and as previously described in detail. Therefore, none of saidjust mentioned elements will again be described since they aresubstantial duplicates of the corresponding previously describedelements.

The previously mentioned first inflow means, generally designated a-t21, also includes an additional inflow conduit portion 21B functionallysimilar to and connected in parallel with respect to the previouslydescribed first inlet conduit portion 21B and has its outlet endconnected to the previously referred to second-mentioned aspirationmeans 22 in a manner similar to the connection of the correspondingpreviously described first outlet conduit portion 21B with respect tothe first-mentioned aspiration means 22 as shown in detail in FIG. 5 andas previously described in detail herein. Each of said alternateparallel first inflow conduit portions 21B and 21B has a controllablyadjustable metering valve means connected in circuit therewith asgenerally designated at 78 and 78', respectively, and each of saidvalves is of the same type of construction as the previously referred tocontrol and metering valve means 48, `48 and 49. Therefore, all of saidcontrollably adjustable metering valve means will be considered ashaving been adequately described by the specific description hereinafterof the one of them generally designated at 78 and illustrated in detailin FIG. 7. This is also true of the controllably adjustable meteringvalve means 87 which will be referred to hereinafter. Since all of saidelements are substantially equivalent to the previously describedcorresponding elements, they will not be again described at this point,and it will be noted that the second-mentioned aspiration means 22 isconnected to the secondementioned common outflow means 23', and thecommon output conduit portion 23B thereof, in parallel with respect toand similarly with respect to the connection of the rst-mentionedaspiration means 22 (by way of the second chamber means 23A) to thecorresponding common outflow means generally designated at 23 and thecommon output conduit or duct portion 23B thereof.

Normally, the valves 48 and 7.8 would be closed and the valves 48 and 78would be controllably open to any desired degree when the apparatus isto be connected by way of the common output conduit portion 23B to theinflow side 39 of the main swimming pool water circulation pump 3-8.This comprises the arrangement for feeding a desired ratio of make-up`water and chlorinecontaining concentrate liquid 26 to said inlet side39 of said main swimming pool -pump 38, Vand the ratio of the mixedliquids 37 fed thereto can be controlled very precisely and accuratelyby adjusting the ratio-controlling means `62 illustrated in detail inFIG. 6. Also, the metering valve 78 and, in some cases, the meteringvalve 48 can be considered to be an additional part of saidratio-controlling means and may provide additional adjustment thereof tomeet virtually any desired conditions of operation.

However, when the chlorinator 33 is to be connected primarily to theoutflow or high pressure side 41 of the main swimming pool waterrecirculating pump 38, normally speaking, the valves 78 and 48 will beclosed and the valve 78' and 48 lwill be controllably opened to anydesired degree, thus causing the aspiration operation to be effectedprimarily by the second-mentioned aspiration means 22 which feeds themixed first -and second liquids through the check valve means 24' (toprevent undesired reverse or back flow) and the controllably openableand closable valve means 25 of the common output conduit portion 23B' ofthe common outflow means 23 to said high pressure or outlet side 41 ofsaid pump 38. This is clearly shown in FIG. `8. It should also be notedthat under certain conditions of use, both of said aspiration systemsmay be employed in various desired ratios with respect to each other.

The typical controllably adjustable metering valve means 78 illustratedin detail in FIG. 7 includes an arrangement wherein the conduit portion21B is of a flexible type, such as plastic tubing or the like, and thevalve means 78 actually comprises a manually rotatable valve member 79having an exteriorly threaded lower portion 81 threadedly engaging aninteriorly threaded portion 82 of the member 83 whereby rotation of thevalve member 79 will cause the lower flat -abutting end lmember 84 toeither advance or retract with respect to the rest of the undeflectedflexible first inflow conduit portion 21B in the manner best shown inFIG. 7. When it is advanced downwardly, it effectively reduces theinterior cross-sectional area of the flexible conduit portion 21B to anydesired degree and may, in fact, completely close said conduit portion21B, if desired. "On the other hand, threaded upward movement of thevalve member 79 releases the compression `from the flexible conduitportion 21B and allows it to open up and effectively increase itsinterior crosssectional area to the full maximum as determined by theposition of the rotary valve member 79.

'It should be noted that the `controllably adjustable metering valvemeans 78' has parts thereof corresponding to the controllably adjustablemetering valve means 78 designated by corresponding reference numerals,primed, however. This is also true with respect to the controllablyadjustable metering valve means 48, 48', 49 and 87 wherein parts whichcorrespond to those of the controllably adjustable metering valve means78 shown in detail in FIG. 7 are designated by similar referencenumerals followed by the letter, a, in the case of the valve 48, theletter, b, in the case of the valve 48', the letter, c, in the case ofthe valve 49, and the letter, d, in the case of the valve 87.Incidentally, it should be 4noted that while all of said controllablyadjustable metering valve means just referred to are shown as being ofthe same type as the one designated by the reference numeral 78 andillustrated in detail in FIG. 7, the invention is not specifically solimited in all forms thereof. The type of valve shown at 78 in FIG. 7 isparticularly advantageous where the chlorine-containing concentrateliquid 26 is to be fed therethrough in undiluted form prior tocombination with the rest of the main pressurized flowing water enteringthe chlorinator 33 through the input pipe 31. Only two of the said`control valves, the one shown at 78 and the one shown at 78', are sopositioned, and it is highly advantageous that they be of the type shownin FIG. 7 since such a controllably adjustable metering valve means ison a non-corrodible type having no moving valve parts exposed to thechlorine-containing concentrate liquid 26 and further since such a valveacts to minimize the tentency for salting out or deposition of any ofthe salts or other constituents of said liquid 26 in solution or insuspension therein which normally tends to occur at points of flowrestriction to a degree such as to gradually build up and ultimatelycompletely close such a restricted opening. This is true of nearly allprior art valved arrangements and is very much less true of the novelvalves indicated at 78 and 78 since the first inflow conduit portion 21Bor 21B', respectively, are flexible and minimize the tendency for anysuch salting out or deposition of chemicals. In view of the fact thatnone of the other of said controllably adjustable metering valve meansreferred to above is subjected directly to the undilutedchlorine-containing concentrate liquid 26, they may, if desired, bemodified so as to comprise any other suitable valve means, although thetype of valve means illustrated in FIG. 7 provides a very simple andhighly advantageous type of controllably adjustable metering valve means`which may also be said to comprise on-off valve means.

It should also be noted that a container 85 is provided for carrying asuitable acidifying chemical (not shown) which can be fed through aconduit portion 86 and another controllably adjustable metering valvemeans 87 (identical in all respects to the one designated at 78 in FIG.7 and previously described in detail) and then through the end of theconduit portion 86 into a fitting 88a and through the previouslymentioned -first inflow conduit portion 21B to the first-mentionedaspiration means 22 i-f the valve means 78 is open (and valve 78 isclosed) or to the second-mentioned aspiration means 22 if the valve 78is closed and the valve 78 is open, or to both of said aspiration meansin any desired ratio in correspondence with the ratio of the degree ofopening of said valves 78 and 78'. FIG. 4 clearly illustrates thisyfeature of the invention for acidifying the swimming pool water toprovide proper pH control thereof for minimizing the tendency oforganisms and plant life, such as algae or the like, to grow in swimmingpool water and contaminate same. The control of acidity in conjunctionwith the control of chlorine concentration provides the most effectivemeans for optimizing the sanitation aspects of the swimming pool water,and this feature of the invention provides for such.

It should be noted that the conduit portion 23B effectively connecteddownstream with respect to the valve opening 59 of the outflowcontrolling float valve means 51 carried in the second chamber means 23Ais provided with a fitting 88 similar to the left fitting 88a describedabove and shown in detail in FIG. 4 except for the fact that it has noend opening and does not receive a conduit or duct end such as thatshown at 86 in FIG. 4, but instead has the right end of said tting 88closed. Otherwise, it is identical to the structure shown in FIG. 4 ofthe left fitting 88a and, therefore, will not again be described andillustrated.

It should be noted that the structure of the exemplary type ofaspiration means best shown in FIG. 5 is particularly advantageous for avery important reason in addition to the above-mentioned very preciseand accurate and controllably adjustable control of the ratio of themixture of the chlorine-containing concentrate liquid 26 with respect tothe pressurized flowing water supplied from the input pipe 31. Thisadditional advantage lies in the fact that there is virtually notendency for the aspiration means 22, or the other substantiallyidentical one 21', to salt up or to have deposition from thechlorine-containing concentrate liquid 26 of any of the salts or otherconstituents in solution or in suspension therein. Such deposition ofmate. rial at points of flow restriction, such as rigid valvestructures, have caused lmany prior art structures employed undersimilar circumstances to have a progressive deposition of such materialat such points of restriction which has had the undesirable effect ofaltering the flow therethrough even though no such alteration wasdesired and ultimately has had the result of completely shutting off theflow of liquid at such points of material deposition and build up. Thisis not at all true of applicants novel exemplary forrn of aspirationmeans shown at 22 in FIG. 5 because there is no rigid point of verygreat flow restriction in the flow path of the chlorine-containingconcentrate liquid 26. The restricted area Venturi passage 71 providesits control of flow and its back friction primarily by reason of thesubstantial length thereof, which is controllably adjustable, and thisminimizes the necessity for reducing the effective cross section thereofto extremely small values which would tend to produce such deposition.Furthermore, it should be noted that the nozzle 68 is completelyflexible, and this allows pulsations produced as a result of flowthrough the aspiration means 22 to effectively prevent any suchdeposition or to break loose any very small beginning deposition whichmight conceivably occur under the most severe and flow-restrictiveconditions of use with a chlorine-containing concentrate 26 havingexcessively large quantities of such depositable material therein.

Even under such conditions of use, the flexible nature of the nozzle 68and the relatively large cross-sectional area of the Venturi passage 71prevents such deposition from occurring and building up in anundesirable manner which would alter the accuracy and effectiveadjustment of the aspiration means 22 and would ultimately lead to itsfailure.

Such undesirable deposition does not occur in the novel aspiration meansillustrated at 22 in FIG. 5 for the reasons noted above, andadditionally it should be noted that the Very fine and accurate flowratio-controlling adjustment made possible by the ratio-controllingmeans 62 makes it possible to open the controllably adjustable meteringvalve means 78 (or 78 in the case of aspiration means 22') to a degreegreater than -would normally be allowable for the same ratio of the twoliquids, thereby even further minimizing any tendency for suchdeposition or salting out occurring at the point of maximum flow patharea restriction of either of said valves 78 or 78', such as is clearlyshown with respect to the valve 78 immediately under the abutting end 84thereof in FIG. 7.

Thus, it can be seen that the novel arrangement of the aspiration means22 has virtually eliminated any such tendency for material deposition orsalting out either at any of the controllably ,adjustable metering valvemeans or at either of the aspiration means 22 or 22. This is furtherenhanced by reason of the relative longitudinal movement of the nozzle68.

Furthermore, it should be noted that the aspiration means 22 and 22 neednot be arranged with a main flow passage 64 of a non-flexible type as isillustrated in FIG. 5, but said main flow passage 64 may actually be inthe form of a flexible outer tube comprising a forward extension of theconduit 21B positioned immediately around the nozzle 68 in precisely therelationship of both said main flow passage 64 and said first inflowconduit portion 21B of FIG. 5 which is shown as comprising a flexibleplastic tube in FIG. 5, which is designated by the same referencenumeral 21B. Of course, this will require that the first inflow conduitportion 21B have an opening to allow the nozzle 68 to be sealinglyinserted thereinto in a manner functionally equivalent to the showing ofFIG. 5. However, such a modified arrangement would have both the innernozzle 68 and the other main flow passage means 64 of a flexible pipewhich would further act to enhance the effect of flow pulsations and thedeposition minimization effect thereof, as referred to hereinbefore.

Incidentally, it should be noted that there is one slight differencebetween the aspiration means 22 and the aspiration means 22 since theaspiration means 22 has its outlet end 36' connected to the additionalcommon output conduit portion 23B as is clearly shown in FIG. 3.Therefore, this would require a modification of the right end of theblock 63 shown in FIG. 3 from that of the block 63 of FIG. 5 to providefor coupling attachment of a nipple or other fitting means carried bythe left end of the common output conduit means portion 23B' of FIG. 3with respect to the right end of the block 63 of FIG. 3 so as to be ininterior communication with the main flow passage thereof, correspondingto that shown at 64 in FIG. of the first-mentioned aspiration means 22.

FIG. 9 merely illustrates an arrangement where a timer or clock type ofcontroller, such as is shown in broken lines at 89 in FIG. 8 and insolid lines at 89 in FIG. 9, may be coupled with respect to the maininput valve 47 (which may be solenoid operated), which is connected tothe main input pipe 31 to the chlorinator 33 for intermittently openingsaid valve 47 for supplying input water flow at any desired timeintervals and for any desired length of time at each such interval asdetermined by the requirements for maintaining a proper water level inthe swimming pool. It should also be noted that the timer 89 may, ifdesired, be electrically coupled with respect to the pump-driving motor91 for correspondingly intermittently energizing same and intermittentlydriving the main swimming pool water recirculating pump 38. Or these twofeatures may be divorced from each other.

FIG. l0 illustrates a further alternate arrangement wherein a mainswimming pool water level sensor and controller, such as is indicated inbroken lines at 92 in FIG. 8 and in solid lines at 92 in FIG. 10, may beeffectively connected (usually electrically) with respect to the maininput valve 47 to the chlorinator 33 for controlling same in a mannersuch as to feed make-up or input water to the chlorinator 33 andultimately into the main swimming pool water supply only when its levelfalls to or below a predetermined minimum height and also arranged so asto cause said main input valve 47 to be closed when the main swimmingpool water rises to a predetermined maximum height.

In the exemplary form of the invention illustrated, said first andsecond chamber means 21A and 23A are all carried Within and defined by acommon housing means generally designated at 93 which is of a readilyassembleable and disassembleable multiple sliding plastic panelconstruction to facilitate the installation and use thereof.

It should be clearly noted that, in certain forms of the invention, thefirst inflow means, such as designated at 21, and/ or the common outflowmeans, such as is designated at 23, may be somewhat modified and, incertain forms, may eliminate either the first or second chamber means21A and/or 23A and may make direct connections with respect to thecorresponding aspiration means.

The entire chlorinator, in the exemplary form illustrated, is preferablymade of non-corrodible materials such as plastic or the like, althoughvarious other suitable materials may be employed in lieu thereof.

It should be noted that each of the controllably adjustable meteringvalves, such as the exemplary one illustrated in` detail at 78 in FIG.7, was be provided with an upper operating knob for convenient use inmanually rotating same and with scale and index or pointer means toprovide for very accurate setting of each such controllably adjustablemetering valve means. All such operating knobs are designated in FIGS. 1and 2 by the letter K, all such scale means in said FIGS. l and 2 aredesignated by the letter S, and all such index or pointer means in saidFIGS. 1 and 2 are designated by the letter P. Also, it should be notedthat each of the two outflow controlling float valves 51 and 51a areprovided with upper connecting rods and operating handles at the upperends thereof for the purpose of making it possible to manually controlsame when desired. Each of said two connecting rods is designated in thefigures by the letter R, and each of said two operating handles isdesignated in the figures by the letter H.

It should be noted that all of the elements which are primed in FIG. 3may be said to comprise a pressure system or circuit since said elementsare adapted to be connected from the output of the chlorinator 33 to thepressure or outlet side 41 of the pump 38, as is best shown in FIG. 8,as opposed to the other outlet 23B from the chlorinator 33 which may besaid to comprise a suction system or circuit adapted to be connected tothe low pressure suction or inlet side 39 of the pump 38. It should benoted that said pressure and suction systems or circuits may be usedalternately, in conjunction, or in certain forms of the invention eitherone may be eliminated entirely from the apparatus, if desired.

It should be understood that the figures and the specific descriptionthereof set forth in this application are for the purpose ofillustrating the present invention and are not to be construed aslimiting the present invention to the precise and detailed specificstructure shown in the figures and specifically described hereinbefore.Rather, the real invention is intended to include substantiallyequivalent constructions embodying the basic teachings and inventiveconcept of the present invention.

I claim:

1. Liquid additive apparatus of an aspirating and mixing type foraspirating and adding a first liquid to a pressurized flowing secondliquid in a desired ratio, comprising: first inflow means adapted to besupplied with an additive first liquid which is to be added to apressurized flowing second liquid; second inflow means adapted to besupplied with said pressurized flowing second liquid; and aspirationmeans effectively connected in circuit with said first and second inflowmeans, and having common outflow means connected thereto, saidaspiration means including a main flow passage in series with saidsecond inflow means for passing said pressurized flowing second liquidtherethrough to said common outflow means, said aspiration meansincluding an effective Venturi means in said main flow passage meanscommunicating with said first inflow means for applying aspiratingsuction to said first inflow means for aspirating said first liquid intosaid pressurized flowing second liquid in said main flow passage in adesired ratio and for subsequently mixing same, said Venturi meanscomprising an effective outer annular flow passage for said additivefirst liquid in circuit with said first inflow means and an innerreduced-diameter flexible tubular nozzle member for said pressurizedflowing second liquid in circuit with said second inflow means, withboth said outer annular flow passage and said reduceddiameter flexibletubular nozzle member being similarly directed in a substantiallyconcentric manner over substantial portions of the lengths thereof fordirecting flow of said additive first liquid in said outer annular flowpassage and flow of said pressurized flowing second liquid along theinterior of said reduced-diameter flexible tubular nozzle member in thesame direction, said effective outer annular flow passage being ofeffectively reduced crosssectional flow path area as compared withcorresponding upstream and downstream effective cross-sectional flowpath areas, the hollow interior of said main flow passage downstream ofan end of said reduced-diameter flexible nozzle member beingunconstricted and continuously substantially larger in diameter thansaid reduced-diameter flexible nozzle member along the entire lengththereof; and ratio-controlling means for controlling the ratio of saidfirst liquid aspirated from said fir-st inflow means through said outerannular flow passage into said main flow passage of said aspirationmeans for controlling the ratio of said first additive liquid added toand mixed with said pressurized flowing second liquid, saidratio-controlling means comprising means for controllably adjusting andvarying the length of said effectively reduced cross-sectional flow patharea of said outer annular flow passage for said additive first liquidby correspondingly longitudinally relatively moving saidreduced-diameter flexible tubular nozzle member concentrically withrespect to said main flow passage, thus correspondingly modifying theback friction or flow impedance effective in controlling the flow ofsaid additive first liquid into the freely flowing pressurized secondliquid flowing through said main flow passage, said ratio-controllingmeans further comprising controllably adjustable metering valve meanseffectively connected in circuit with said first inflow means upstreamfrom said aspiration means and another controllably adjustable meteringvalve means effectively connected in circuit with said second inflowmeans upstream from said aspiration means, each of said metering valvemeans including a flexible tube supported on an immovable base andprovided in opposition therewith with a controllably advanceable andretractable abutting member for forcibly controllably collapsing theflexible tube and correspondingly closing the hollow interior thereof toany desired degree.

2. Apparatus as defined in claim 1, wherein said first inflow meansincludes a chamber means connected in circuit therewith between an inputportion of said first inflow means and said aspiration means and adaptedto contain a quantity of said additive first liquid which is to be addedto said pressurized flowing second liquid.

3. Apparatus as defined in claim 1, wherein said first inflow meansincludes a chamber means connected in circuit therewith between an inputportion of said first inflow means and said aspiration means and adaptedto contain a quantity of said additive first liquid which is to be addedto said pressurized flowing second liquid, said chamber means beingprovided with outflow-controlling float valve means operable foreffective closure of said first inflow means between said chamber meansand said aspiration means in response to outflow of said additive firstliquid from said chamber means to a predetermined lower minimum level ofthe top surface thereof, and effectively operable for opening said floatvalve means in response to the rising of the top surface level of saidadditive first liquid in said chamber means above said predeterminedlower minimum level thereof.

4. Apparatus as defined in claim 1, wherein said common outflow meansincludes a chamber means connected in circuit therewith between saidaspiration means and an output portion of said common outflow means.

5. Apparatus as defined in claim 1, wherein said common outflow meansincludes a chamber means connected CII in circuit therewith between saidaspiration means and an output portion of said common outflow means,said chamber means being provided with outflow-controlling float valvemeans operable for the effective closure of said common outflow meansconnected to said chamber means in response to outflow of the mixedfirst and second liquids from said chamber means to a predeterminedlower minimum top surface level thereof, and operable for the effectiveopening of said float valve means in response to the rising of the topsurface level of said mixed first and second liquids in said chambermeans above said predetermined lower minimum level thereof.

6. Apparatus as defined in claim 1, wherein said common outflow meansincludes a chamber means connected in circuit therewith between saidaspiration means and au output portion of said common outflow means,said chamber means being provided with inflow-controlling float valvemeans operable for effective closure of said second inflow meansupstream of said aspiration means in response to flow of said mixedfirst and second liquids from said aspiration means into said chambermeans to a predetermined upper maximum level of the top surface thereof,and effectively operable for the opening of said float valve means inresponse to the dropping of said top surface level of said mixed firstand second liquids in said chamber means below said predetermined uppermaximum level thereof.

7. Apparatus as defined in claim 1, wherein said common outflow meansincludes a chamber means connected in circuit therewith between saidaspiration means and an output portion of said common outflow means,said chamber means being provided with inflow-controlling float valvemeans operable for effective closure of said second inflow meansupstream of said aspiration means in response to flow of said mixedfirst and second liquids from said aspiration means into said chambermeans to a predetermined upper maximum level of the top surface thereof,and effectively operable for the opening of said float valve means inresponse to the dropping of said top surface level of said mixed firstand second liquids in said chamber means below said predetermined uppermaximum level thereof, said chamber means being provided withoutflow-controlling float valve means operable for the effective closureof said common outflow means connected to said chamber means in responseto outflow of the mixed first and .second liquids from said chambermeans to a predetermined lower minimum top surface level thereof, andoperable for the effective opening of said outflow-controlling floatvalve means in response to the rising of the top surface level of saidmixed first and second liquids in said chamber means above saidpredetermined lower minimum level thereof.

8. Apparatus as defined in claim 1, wherein said first inflow meansincludes a first chamber means connected in circuit therewith between aninput portion of said first inflow means and said aspiration means andadapted to contain a quantity of said additive first liquid which is tobe added to said pressurized flowing second liquid, said common outflowmeans including a second chamber means connected in circuit therewithbetween said aspiration means and an output portion of said commonoutflow means.

9. Apparatus as defined in claim 8, including housing means effectivelycarrying and defining said first and second chamber means therein.

10. Apparatus as defined in claim 9, wherein said second chamber meansis provided With inflow-controlling float valve means operable foreffective closure of said second inflow means upstream of saidaspiration means in response to inflow of said mixed first and secondliquids from said aspiration means into said second chamber means to apredetermined upper maximum level of the top surface thereof, andeffectively operable for the opening of said float valve means inresponse to the dropping of said top surface level of said mixed firstand second 17 liquids in said second chamber means below saidpredetermined upper maximum level thereof.

11. Apparatus as defined in claim 1, wherein said first inflow meansincludes a lirst chamber means connected in circuit therewith between aninput portion of said first inflow means and said aspiration means andadapted to contain a quantity of said additive first liquid which is tobe added to said pressurized flowing second liquid, said common outflowmeans including a second chamber means connected in circuit therewithbetween said aspiration means and an output portion of said commonoutflow means, said first chamber means being provided withoutflow-controlling tioat valve means operable for effective closure ofsaid first inflow means between said first chamber means and saidaspiration means in response to outllow of said additive first liquidfrom said first chamber means to a predetermined lower minimum level ofthe top surface thereof, and effectively operable for opening said floatvalve means in response to the rising of the top surface level of saidadditive first liquid in said first chamber means above saidpredetermined lower minimum level thereof, said second chamber meansbeing provided with outow-controlling float valve means operable for theeffective closure of said common outflow means connected to said secondchamber means in response to outow of the mixed first and second liquidsfrom said second chamber means to a predetermined lower minimum topsurface level thereof, and operable for the effective opening of saidoat valve means in said second chamber means. In response to the risingof the top surface level of said mixed first and second liquids in said18 second chamber means above said predetermined lower minimum levelthereof.

12. Apparatus as defined in claim 1, wherein said apparatus compriseschlorinating apparatus for adding said first liquid, comprising achlorine-containing liquid, to said pressurized flowing second liquid,comprising pressurized water for a swimming pool, in a controllablyadjustable desired ratio and for electively mixing same together.

13. Apparat-us as defined in claim 1, wherein said means forcontrollably adjusting the variable length of said reducedcross-sectional tiow path area of said outer annular ow passagecomprises manually operable actuator means including a manuallyrotatable toothed gear provided with and cooperating with alongitudinally toothed slidably mounted rack member coupled to saidreduced-diameter flexible nozzle member for controllably moving saidnozzle member inwardly or outwardly relative to said main flow passage.

References Cited UNITED STATES PATENTS 1,936,538 11/1933 Borden 137-571X 2,789,573 4/1957 Glass 137-101.27 2,900,176 8/1959 Krogel 137-101.27 X3,049,144 8/ 1962 Oleskow 137-391 FOREIGN PATENTS 541,315 11/ 1941 GreatBritain.

ALAN COHAN, Primary Examiner. 1 vI. ZOBKIW, Assistant Examiner,

